DOI QR코드

DOI QR Code

Decomposition Properties of Trifluoroiodomethane under Discharges and Interruptions

  • Cai, Fan-Yi ;
  • Tan, Dong-Xian ;
  • Zhou, Bai-Jie ;
  • Xue, Jian ;
  • Xiao, Deng-Ming
  • Received : 2018.05.23
  • Accepted : 2018.08.27
  • Published : 2018.11.01

Abstract

This paper is devoted to detecting decomposition characteristics of Iodotrifluoromethane ($CF_3I$) under alternating current (AC) discharges or load current interruptions. The decomposition products are measured utilizing chromatography-mass spectroscopy. It is found that less than 1% $CF_3I$ gas decomposed after several interruptions at load current of 200 A or hundred times of AC discharges. However, under interruptions at a current of 400 A, more than 95% $CF_3I$ gas decomposed into carbon tetrafluoride ($CF_4$) and hexafluoroethane ($C_2F_6$). The equilibrium compositions based on Gibbs free energy minimization of $CF_3I$ was calculated to explain the decomposition mechanism.

Keywords

$CF_3I$;Decomposition products;Interruption

Acknowledgement

Grant : Research on SF6 Alternative Gas for Insulation and Arc Quenching Application

Supported by : SGCC